Re: [Discuss-gnuradio] how to pass a large number of items between blocks?

[Mostafa Alizadeh]

Hi Martin, 

Yes you're right, 75000 items isn't so large! But after passing these items through an encoder, the number of items becomes about 227000!! That's a big number! 

However, I skewed over the problem and till now I've reached to this point that I may use 3 or 4 inputs-ouputs ports per block (instead of actually one input-ouput port) and divide the 227000 items into 4 parallel streams and read all of them through 3/4 different input ports and put them out to the 3/4 output ports ! That seems work but I'm not sure that's the best one. 

If you have any idea I'll be appreciate you so much. 

best, 

    

On Wed, May 14, 2014 at 1:04 PM, Martin Braun <address@hidden> wrote:

On 13.05.2014 19:27, Mostafa Alizadeh wrote:

Hi,

I recently encountered a problem with the large number of items. I wanna
pass about 75000 items from one block to the another. I thought that I
could do this with setting the min of output items in the constructor of
the block but I got the following error by runtime:

thread[thread-per-block[1]: <block crc (1)>]: Buffer too small for
min_noutput_items

I searched around but I couldn't find a cogent response. please help me!

You could use your own version of tagged streams to indicate boundaries... regular tagged stream blocks also suffer from buffer limitations.

That said, 75000 items doesn't seem all that large. What's your item size, is it sizeof(gr_complex)? Did you set your kernel.shmmax = 2147483648?

M


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